Fuse for the production of heat



Nom 113 H923.,

L. RISK FUSE FOR THE PRODUCTION OF HEAT Filed Sept. ll, 1922 lli atentedNov. 13, 1923..

lTED

LOREN RISK, OF MINNEAPOLIS, MINNESOTA.

FUSE ron THE 'ritonucrrom or HEAT.

Application med september 11, 1922. serial No. 587,640.

To aZZ whom t may concern:

of Minnesota, have invented certain new and useful Improvements inFusesfor the Production of Heat, and I do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

ly present invention provides an improved fuse adapted for the quick oralmost instantaneous production of heat in devices such astire-patch-applying devices, flat irons, branding irons, curling ironsand the like. articularly, the fuse is designed for use in connectionwith tools for applying cement patches to the inner tubes of pneumatictires and its more general utility will be obvious from its descriptionin connection with the tool of the character disclosed and claimed in mypending application Serial Number 577.877, filed July 27, 1922.

'F or use in the particular tool above noted, the

varied, at will. The salient feature of novelty is found in the factthatat least one of f the fuse plates or elements is corrugated. Fusesof this general character, as is well known, have within themselves theelements necessary to support combustion independently of air supply or,in other words, said fuses are slowly explosive or -almostinstantaneously combus'ted, so lthat if the gases produced wereconfined, the-force of the explosion would be more or less destructive.The function ofthe corrugations in the fuse is to permit free escape ofthe gases from all points ofthe fuse, thereby permitting a complete andlalmost instantaneous combustion of the entire fuse without damage totthe tool. The corrugated fuse may be constructed in various differentways and combined either with other corrugated fuse elements or with oneor more immediately adjacent flat or uncorrugated fuses. Where twocorrugated fuses or two fuse elements are placed together, thecorrugatio'ns of the oner should be transversely ofthe corrugations ofthe other.

' In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.

eferring lto the drawings:

fuses are made rectangular in contour,y but for other tools, the coutourmight be ving the subject-matter of Fig. l is a perspective with. someparts broken away, showing the improved fuse applied wit'hin a tool otthe character disclosed and claimed in my co-pending application aboveidentified;

Fig. 2 is an enlarged transverse section taken on the line 2-2 of Fig. 1and showing also an'inner tube and a patch to which the tool is applied;

Fig. 8 is a perspective showing a corrugated fuse made up of two platesor elements, said elements being separated;

Fig. 4 is a section on the line -t-eof Fig. 3, showing the twocorrugated fuse elements placed together; Fig. 5 is a perspectiveshowing a fuse element corrugated on two faces;

Fig. 6 is a section on the line 6-.6 of Fig. 5, some parts being brokenaway;

ig. 7 is a section showing two corrugated fuse elements and oneintervening flat or uncorrugated'fuse element;

Fig. 8 is a fragmentar section .showing a fuse element corrugatedY onboth sides by pressing a normally fiat sheet into the form illustrated;and

Fig. 9 is a perspective showing a flat or uncorrugated fuse plate orelement adapted or use with any one or more of the corrugated fuseelements.

The tool shown in Figs. 1 and 2, not bethe present application, may bebriefly described as folows: f

The numeral 10 designates the body portion of the tool, the same beingin the form of ceptacle or body 10 is provided with a suitable handle12. rectangular cover 13, which, as shown, has upstandin flanges and isitself in the form of a pan, is inged to the body 10 by pintles 14 andraised, as shown by dotted lines in Fig. 1 to permit the placed on body10 an as shown by full lines in Figs. 1 and 2.

The fuse shown in Figs. 3 and 4 comprises two fuse elements or platesthat are corrugated on one side, as indicated at 16. These fuse elementsmay be used separately ortogether, but in Figs. 1 and 2, both of theseelements are shown as placed in the tool with the corru ations 16 of thetwo elements at right angles to each other.

The fuse element 17 shown in Figs. 5 and 6 is-corrugated on both faces,as indicated at 18, and thevupper and lower corrugations are at rightangles to each other. The fuse shown in Fig. 7 is made up of two fuseelements 15 and an intervening flat fuse element 19. In thisarrangement, the corrugations 16 of the two fuse elements 15 are shownas in parallel arrangement, but with a flat intervening fuse plate, thecorrugations of the two plates may be run at right angles.

he fuse shown in Fig. 8 is made of a single plate 20 that is normallyfiat but is pressed to form corrugations on both sides. This fuseelement 20 may be used alone or with any of the other fuse elements, butwould generally be used in connection with a flat fuse element 19,- suchas shown-in ll of the fuse elements described will be made of somesuitable and absorbent material, such as straw board, paper board orother material that is more or less combustible and is porous enough toabsorb the required amount of combustible material. As a combustiblematerial for the fuse, I have generally employed potassium nitrate andpotassium chlorate in solution or in an emulsion with water and in theapproximate proportions of two pounds ofpotassium nitrate, two ounces ofpotassium chlorate and one gallon of water. The porous body of the fuseis then thoroughly saturated with this solution or emulsion and when thewater or liquid substance has evaporated, the fuse will be ready for useand may be quickly and easily ignited by the llamefrom a match or thelike.

It will, of course, be understood that the number of fuse elements inthe combination 'or arrangement of the fuse elements such as illustratedor other design on the plan illustrated, would depend largely on theamount of heat that is to be produced for anyparticular kind of work. Bythe use of these fusesf the heating device may be brought to the desiredhigh temperature almost instantly, and it will remain hot for aconsiderable time, as not only are the iron elements of the heaterbrought to the desired high temperature, but .the unconsurned bodportion of the fuse will, after the slow exp osion, remain as a red hotelement that gradually cools and, hence, holds a considerable amount ofstored-up heat units.

It is highly important to note that at least i one of the fuse elementsor plates is corrugated and that its corrugated surface is placed incontact with one or the other combustible fuse elements. This isimportant because in such an arrangement, the contacting surfaces of thetwo fuse elements are capable of simultaneous combustion, which willtake place in the channels afforded by the corrugated surface of thecorrugated plate. This simultaneous or double combustion produces lthemost intense heat, because the combustion will be complete both aboveand below all of the approximately horizontal air passages.

The tool .or heating device may be used in a good many different waysand, as indicated, for different purposes, but the preferred manner'ofusing the tool in applying patches to pneumatic inner tubes is clearlyset forth in my said prior application.

lVhat I claim is:

1. A fuse of the character disclosed comprising several plate-like fuseelements, at least one of which has a corrugated surface placed incontact with the opposing surfaces of the adjacent combustibleplate-like fuse element.

2. A fuse of the character disclosed comprising several plate-like fuseelements, at least one of whichhas a iiat surface and at least one ofwhich has a corrugated surface, the fiat and corrugated portions of saidfuse elements being in contact and capable of simultaneous combustionwhereby intense heat will be produced.

In testimony whereof I affix my signature. LOREN RISK.

